Most cases of childhood acute lymphoblastic leukemia (ALL) are associated with a genetic predisposition and a sterile environment, say British scientists from the Cancer Research Institute, about their work writes MedicalXpress.

The researchers conducted a meta-analysis of dozens of works devoted to lymphoblastic leukemia, and came to the conclusion that the formation of this disease occurs in two stages.

First, as a result of the genetic mutation, the probability of which is about 5%, the fetus has a predisposition to this ailment. Then ALL is provoked by one of the usual diseases like colds.

At the same time, the authors of the study note that children who have spent their first year of life in "sterile" conditions are much more strongly affected by the disease, avoiding contacts with peers and rarely visiting public places. At the same time, this ailment is much less common in children visiting nurseries.

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